Spring Boot in Docker

Process

1. build jar file
2. build docker image
3. test image locally
4. login and push to https://hub.docker.com
5. make EC2 instance
6. install docker and start docker daemon
7. run docker image

• Dockerfile

FROM openjdk:11-jre-slim-buster
ARG JAR_FILE=build/libs/*.jar
COPY ${JAR_FILE} app.jar
ENTRYPOINT ["java","-jar","/app.jar"]

Command

1. build jar file
   • gradle build
2. build docker image
   • docker build -t kenu/sb-demo
     • kenu: hub.docker.com account
     • sb-demo: image file name
3. test image locally
   • docker run -p 8100:8080
4. login and push to https://hub.docker.com
   • docker login
   • docker push kenu/sb-demo
5. make EC2 instance
6. install docker and start docker daemon
   • sudo yum install docker -y
   • sudo systemctl start docker
7. run docker image
   • sudo docker run -p 8080:8080 kenu/sb-demo
   • sudo docker run -d -p 8080:8080 kenu/sb-demo
8. stop docker image
   • docker ps
   • docker stop `docker ps -q`

With Jenkins

sudo docker stop `sudo docker ps -q`
sudo docker rmi kenu/sb-demo -f
sudo docker run -d -p 8080:8080 kenu/sb-demo

ref

• https://spring.io/guides/gs/spring-boot-docker/